1. If a solid piece of iron shaped as a doughnut was placed under extreme heat, what would the hole in the middle do?

2. Is balancing a baseball bat vertically on your hand easier with the larger end at the top or with the smaller end at the top?

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THE SOLUTION

1. It would grow larger.

2. It is easier to balance a baseball bat with the larger end at the top. This is because it gives the bat a larger moment of inertia. So, with your hand as the pivot, the bat rotates slower, making it easier to correct when it starts to topple over.